/*
 * Copyright [2020] [MaxKey of copyright http://www.maxkey.top]
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


package org.maxkey.web.tag;

import java.io.IOException;
import java.util.Map;

import org.maxkey.util.DateUtils;

import freemarker.core.Environment;
import freemarker.template.TemplateDirectiveBody;
import freemarker.template.TemplateDirectiveModel;
import freemarker.template.TemplateException;
import freemarker.template.TemplateModel;

/**
 * 获取应用上下文标签
 * <@date format="" value=""></@date>
 *
 * @author Crystal.Sea
 */

@FreemarkerTag("date")
public class DateTagDirective implements TemplateDirectiveModel {

    @Override
    @SuppressWarnings("rawtypes")
    public void execute(Environment env, Map params, TemplateModel[] loopVars, TemplateDirectiveBody body)
            throws TemplateException, IOException {
        String dateValue = params.get("value").toString();
        String format = params.get("format").toString();
        String dateString = "";
        if (dateValue == null) {
            if (format == null) {
                dateString = DateUtils.getCurrentDateAsString(DateUtils.FORMAT_DATE_YYYY_MM_DD);
            } else {
                dateString = DateUtils.getCurrentDateAsString(format);
            }
        } else {
            if (format == null) {
                dateString = DateUtils.format(DateUtils.tryParse(dateValue), DateUtils.FORMAT_DATE_YYYY_MM_DD);
            } else {
                dateString = DateUtils.format(DateUtils.tryParse(dateValue), format);
            }
        }

        env.getOut().append(dateString);

    }

}
